The Racer Pro is the slalom PFD from Peak, a slimmer fit than the old Airlite this gives better movement and lets you get close to the poles! Designed for slalom but also great for freestyle. For the money a great PFD.

What they say:

ISO Approved. Ultra narrow cut. Ripstop nylon shell with neoprene shoulders. 50-70N of Gaia environmentally friendly soft foam. Shoulder, waist and side straps. Reflective stripes front and back. Velcro access to remove or add flotation foam to meet specific event testing.